Expandable envelope with a closure flap



FIG. 1 illustrates a front perspective view of the expandable envelope with a closure flap of the design in a flat and opened condition;

FIG. 2 illustrates a front view of the envelope of FIG. 1 in a flat closed condition;

FIG. 3 illustrates a rear view of the envelope of FIG. 2 in a flat closed condition;

FIG. 4 illustrates a top view of the envelope of FIG. 2 in a partially opened condition;

FIG. 5 illustrates a bottom view of the envelope of FIG. 2 in a partially opened condition;

FIG. 6 illustrates a side view of the envelope of FIG. 2 in a partially opened condition;

FIG. 7 illustrates a perspective view of the envelope of FIG. 1 in a filled-to-capacity and sealed condition; and,

FIG. 8 illustrates a side view of the envelope of FIG. 7 in a filled-to-capacity condition. 

The ornamental design for an expandable envelope with a closure flap, as shown and described. 